445321220 has 24 divisors (see below), whose sum is σ = 935668608. Its totient is φ = 178034400.

The previous prime is 445321207. The next prime is 445321223. The reversal of 445321220 is 22123544.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (445321223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42725 + ... + 52115.

It is an arithmetic number, because the mean of its divisors is an integer number (38986192).

Almost surely, 2^445321220 is an apocalyptic number.

It is an amenable number.

445321220 is an abundant number, since it is smaller than the sum of its proper divisors (490347388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445321220 is a wasteful number, since it uses less digits than its factorization.

445321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11771 (or 11769 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 445321220 is about 21102.6353804448. The cubic root of 445321220 is about 763.6443274697.

Adding to 445321220 its reverse (22123544), we get a palindrome (467444764).

The spelling of 445321220 in words is "four hundred forty-five million, three hundred twenty-one thousand, two hundred twenty".